Loader addition on Bolens G244

[Ilikeurtractor]

Hi all. Looking for help/advice on tapping the tractor hydraulics on a Bolens G244 machine to operate a loader from another dissimilar tractor. Based on the manual and looking at the transmission housing, I've concluded I need to tap into the hydraulic cap shown in the attached picture. The problem is there are three ports under the cap, and I don't know for sure the best way to utilize them. Ports A and B are connected to each other through the cap, C is blinded as you can see. My loader control valve (LCV) is an open-center design. My other tractors just take the supply from the pump (port A here), run it to the LCV, and return it right back to the tractor using the equivalent of the B port shown in the picture which I'm guessing should work fine, but I'm curious as to why there is a C port and what it might be used for (?) I'm speculating the C port is another return to sump, but I'm not sure and if it is I'm not sure how one should use it. I also understand there is a power-beyond port on the LCV which is currently plugged.

Maybe I should run port A to the LCV supply side, then run the power beyond port to port B on the tractor, and then run the LCV drain to port C? I've read a little on power-beyond and how it's suppose to work but I'm not sure if it applies here. If I ignore port C and just pipe port A to the LCV and take its drain to port B I'm thinking it should be fine (like my other tractors) but I don't know if that is the intended method as the LCV drain port is not designed to see pressure which it would if piped this way. Thanks for the suggestions/guidance in advance and I apologize if this has been answered before but I can't find it specifically written for this case.

 

[Ilikeurtractor]

I think I figured it out. The C port does indeed appear to be another sump drain. In order to utilize the power-beyond port on the LCV it requires some sort of sleeve insert I don't have which essentially makes the power-beyond port the same as the drain port (without the sleeve). So this means I only really have one option and that is to pipe the A port of the tractor to the IN port of the LCV and the OUT/drain port of the LCV to the B port on the tractor, ignoring the C port. The only potential problem I see with this scheme is that if one uses a "downstream" (from the LCV) hydraulic component such as the 3-pt ram the LCV could see high pressure on the tank return port (drain) which I think would cause the relief valve of the LCV not to operate correctly since it functions on the differential pressure between the IN port and the drain port pressures. This could cause excessive pressure on the LCV and hoses if the drain port pressure is high and the pump pressure is not relief-valve protected upstream of the LCV. Seems like it shouldn't be this complicated but apparently it is or maybe I'm just off on my understanding of the system.